#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>
int main() {
	int a = 15, b = 21, m = 0;
		switch(a% 3)
		{
		case 0:m++; break;
		case 1:m++;
		switch(b % 2)
		{
		default:m++;
		case 0:m++; break;
		}
	}
		printf("%d\n", m);
}